78304512 has 288 divisors, whose sum is σ = 263725056. Its totient is φ = 20275200.

The previous prime is 78304487. The next prime is 78304531. The reversal of 78304512 is 21540387.

It is a super-2 number, since 2×78304512² = 12263193199116288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78304512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2525937 + ... + 2525967.

It is an arithmetic number, because the mean of its divisors is an integer number (915712).

Almost surely, 2^78304512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78304512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131862528).

78304512 is an abundant number, since it is smaller than the sum of its proper divisors (185420544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78304512 is a wasteful number, since it uses less digits than its factorization.

78304512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 78304512 is about 8848.9836704562. The cubic root of 78304512 is about 427.8211614902.

Adding to 78304512 its reverse (21540387), we get a palindrome (99844899).

It can be divided in two parts, 78 and 304512, that added together give a triangular number (304590 = T₇₈₀).

The spelling of 78304512 in words is "seventy-eight million, three hundred four thousand, five hundred twelve".